499839 has 4 divisors (see below), whose sum is σ = 666456. Its totient is φ = 333224.

The previous prime is 499819. The next prime is 499853. The reversal of 499839 is 938994.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 499839 - 2⁷ = 499711 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 499839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83304 + ... + 83309.

It is an arithmetic number, because the mean of its divisors is an integer number (166614).

2⁴⁹⁹⁸³⁹ is an apocalyptic number.

499839 is a deficient number, since it is larger than the sum of its proper divisors (166617).

499839 is a wasteful number, since it uses less digits than its factorization.

499839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166616.

The product of its digits is 69984, while the sum is 42.

The square root of 499839 is about 706.9929278288. The cubic root of 499839 is about 79.3615326316.

The spelling of 499839 in words is "four hundred ninety-nine thousand, eight hundred thirty-nine".